Freescale Semiconductor Microcontrollers - Manual (Page 346)

MON08 Interface Connection
Device Class Description
346 Microcontrollers Debugger Manual
Device Class Description
The following device information summarizes the different classes of boards available to
the user. Detailed information about specific devices is available from Freescale.
Class 1 Device
ICS Board with processor installed. This is the standard and most common configuration
of the ICS08 boards. In this configuration, the processor is resident in one of the sockets
on the ICS board itself. The processor can be debugged and programmed in this
configuration, and an emulation cable containing all the processor I/O signals can be
connected to the user's MCU development board. In this configuration, the ICS board
hardware can automatically power up and down the processor in order to pass security in
the simplest fashion. The user must be sure not to provide power from the MCU
development board, up through the emulation cable, to the processor pins themselves,
when this dialog box appears. This is so that the software, when attempting to establish
communications, can fully power the processor down. The software running on the PC
controls power to the user’s MCU development board via the serial port DTR line.
Class 2 Device
ICS Board without processor, connected to the user’s microprocessor system via MON08
Cable. In this configuration, there is no processor resident in any of the sockets of the ICS
board itself. The processor is mounted down in the user’s MCU system. The connection
from the ICS board to the user’s MCU system is accomplished via the 16-pin MON08
connector. In this configuration, since the ICS does not control power to the processor, the
user is prompted to turn the processor's power supply on and off. Turning off the power
supply is necessary to pass the initial security mode check and access the Flash on the
processor. A simple reset is not enough; to pass the security check, you must first force the
processor to encounter a POR (power-on reset) which requires that the processor's voltage
dip below 0.1v. Once security is passed, resetting the device or re-entering the software is
easier.
Class 3 Device
Custom Board (no ICS) with MON08 serial port circuitry built in. In this configuration,
the ICS board is not used at all. The user must provide a serial port connection from the
PC, and provide all hardware configurations necessary to force the processor into MON08
mode upon reset. This includes resets both internal and external to the processor. In this
configuration, because the software does not directly control power to the processor, the
user is prompted to turn the processor's power supply on and off. The user is be prompted
to turn power on and off to reset the microprocessor, as the PC doesn't have control of the
microprocessor reset. Turning off the power supply is necessary to pass the initial security